Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/petclap/public_html/production/vendor/sebastian/comparator/tests/SplObjectStorageComparatorTest.php:23 Stack trace: #0 {main} thrown in /home/petclap/public_html/production/vendor/sebastian/comparator/tests/SplObjectStorageComparatorTest.php on line 23